교과서 질문
Mucus-secreting membranes are found in:
a. The urinary system
b. The digestive cavity
c. The respiratory passages
d. All of the above
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목차
- 1. Introduction to Microbiology3h 27m
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19. Innate Immunity
Physical Barriers in First-Line Defenses: Mucous Membrane
Multiple Choice
Which physical, nonspecific host defense mechanism is associated with the respiratory tract and trachea?
A
Water-repelling keratin proteins.
B
Lysozyme enzymes.
C
Mucociliary escalator.
D
Salivary amylase.
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검증된 단계별 안내1
Understand the role of the mucociliary escalator: It is a defense mechanism in the respiratory tract that helps to trap and move particles and pathogens out of the airways.
Recognize the components of the mucociliary escalator: It consists of mucus-producing goblet cells and ciliated epithelial cells lining the respiratory tract.
Learn how the mechanism works: The mucus traps inhaled particles and microorganisms, while the cilia beat in a coordinated manner to move the mucus upwards towards the throat.
Identify the location: The mucociliary escalator is primarily found in the trachea and bronchi, which are parts of the lower respiratory tract.
Differentiate from other mechanisms: Unlike enzymes like lysozyme or proteins like keratin, the mucociliary escalator is a physical mechanism that relies on the movement of cilia and mucus to protect the respiratory system.
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